tekmar 262 Boiler Control User Manuals - Manual

Copyright © 1999 U 262 -06/99 1 of 4
- User Brochure U 262
06/99 Boiler Control 262
User Interface
!
DHW
Burner
Displays when the stage 1 and
/ or stage 2 relay is turned on.
Pump
Displays when the boiler pump
is operating.
DHW Pump / Valve
Displays when the DHW pump
or valve is on.
Boost
Displays when the control is in
boost after setback.
UnOccupied
Displays when control is in
unoccupied mode.
Occupied
Displays when the control is in
occupied mode.
Override
Displays when the control is in
override mode.
Warning
Displays when an error exists
or a limit has been reached.
Lock - Unlock
Displays whether access
levels are locked or unlocked.
Pointer
Displays control operation as
indicated by text.
UnOcc
1
Ovr
° F, ° C, sec,
min, hr
Occ
The Boiler Control 262 is a microprocessor based control designed to stage and rotate two on/off boiler stages
(or one low/high fire boiler) to maximize the comfort and efficiency of a hydronic heating system. The control
is designed to operate in two distinct modes. Mode 1 allows for the control to provide a reset supply water
temperature to a heating system, indirect Domestic Hot Water (DHW) generation, and the integration of a
setpoint load. Multiple zone temperature control is achieved by using either thermostats or tekmar Zone
Controls. Mode 2 is designed specifically for dedicated DHW applications in order to provide heat to a DHW
storage system. Standard features include Equal Run Time Rotation, Auto Differential, digital temperature
readouts, and pump exercising.
Access Level(s) The tekmar Boiler Control 262 has four access levels which are LTD (limited), USER, INST (Installer), and ADV
(advanced). This brochure only covers the LTD (Limited) and USER levels. Only qualified service people should adjust the INST
(Installer) and ADV (advanced) access levels.
Boiler Demand
DHW Demand
Setpoint Demand
WWSD
Minimum
Maximum
Menu Item
Number Field
Displays the current value
of the selected item
{
Buttons
Selects Menu,
Items and adjusts
settings
Misc
°F°C
1
Ovr
DHW
View
Adjust
Schd hr
Monitor
Menu Field
Displays the
current menu
Status Field
Displays the
current status of
the control’s
inputs, outputs
and operation
Item Field
Displays an abbreviated
name of the selected item
UnOcc
!
sec
min
1 2
The tekmar Boiler Control 262 has a Liquid Crystal Display (LCD) and four push
buttons (
Menu, Item, , ) which are used to view and adjust the settings.
Menu
All of the items displayed by the control are organized into various menus. These menus
are listed on the left hand side of the display (Menu Field). To select a menu, use the
Menu button. By pressing and releasing the Menu button, the display will advance to the
next available menu. Once a menu is selected, there will be a group of items that can
be viewed within that menu.
Item
The abbreviated name of the selected item will be displayed in the item field of the display.
To view the next available item, press and release the
Item button. Once you have
reached the last available item in a menu, pressing and releasing the Item button will
return the display to the first item in the selected menu.
Adjust
To make an adjustment to a setting in the control, begin by selecting the appropriate
menu using the
Menu button. Then select the desired item using the Item button. Finally,
use the and/or button to make the adjustment.
Additional information can be gained by observing the Status and Pointers fields of the
LCD. The status field will indicate which of the control’s outputs are currently active. Most
symbols in the status field are only visible when the View Menu is selected.
2 1
°F, °C, sec, min, hr,
Units of measurement.
Menu Item
R Boiler Control 262 Two Stage Boiler & DHW / Two Stage DHW LR 58223 N R T L / C
Boiler Demand DHW Demand Setpoint Demand WWSD Minimum Maximum 2
1
°F
View
1
Occ